For my two favourite troll ocs I have

Cortin Schwar: no caps or punctuation, duplicates all her s's. She started life as a Spades Slick fantroll when I was 16, so she has slick's exile typing style combined with the double letters. outside of that, i think it's a good quirk for communicating sort of a mutter-y ranty jerk.

Polari Petrix: perfect caps and punctiation. surrounds o, n and m with \ /. groups of these letters are surrounded as a group (b\oo/k, c\om/pete\n/t, \on/ly, etc) for ease of reading and writing. her symbol is the Denis Moskowitz symbol for Corona Borealis So I wanted her quirk to look like it. (She started life as a snowman fantroll and he first quirk replaced o's with 8, but the overlaps with vriska made it read strangely)